package com.example.demo.util;

import java.util.Random;

/**
 * Description:
 * User: SaintChan
 * Date: 2018-01-26
 * Time: 下午 2:52
 */
public class KeyUtil {
    /**
     * 生成唯一的主键
     * 格式：时间+随机数
      * @return
     */
    public static synchronized String genUniqueKey(){
        Random random = new Random();

        Integer number = random.nextInt(900000)+100000;
        return System.currentTimeMillis() + String.valueOf(number);

    }
}
